One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,5)(4,6)(7,8)(10,14)(11,12)(17,18,23,28)(19,24,29,32)(20,30,31,26)(21,27,22,25)(1,3)(2,5)(4,7)(6,8)(9,10)(11,15)(12,16)(13,14)(17,19,23,29)(18,24,28,32)(20,21,31,22)(25,30,27,26)(3,7)(5,8)(10,14)(15,16)(18,25)(19,29)(21,22)(24,26)(27,28)(30,32) involution — undirected(2,6)(3,7)(9,11,13,12)(10,15,14,16)(17,20)(18,26)(19,21)(22,29)(23,31)(24,25)(27,32)(28,30)(3,7)(5,8)(9,12,13,11)(10,15,14,16)(17,21,23,22)(18,27,28,25)(19,20,29,31)(24,30,32,26)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.